Speed, glide, turn, and fade are the molded numbers. Turn plus fade sorts the disc as understable, stable, or overstable. The line also uses how far you throw a distance driver, because a disc thrown well under its speed fades harder and turns less.
Right-hand backhand draws turn to the right and fade to the left. Left-hand backhand and forehand mirror that. The chart is a planning sketch, not a measured flight.
One disc is free. $5 draws every disc in the bag on the same chart.